options Collection

Retrieves a collection of the option objects in a select object.

dhtml语法

[ oColl = ] SELECT.options
[ oObject = ] SELECT.options(vIndex [, iSubIndex])

DHTML可能的值

oColl Array of option objects.
oObject Reference to an individual item in the array of elements contained by the object.
vIndex Required. Integer or string that specifies the element or collection to retrieve. If this parameter is an integer, the method returns the element in the collection at the given position, where the first element has value 0, the second has 1, and so on. If this parameter is a string and there is more than one element with the name or id property equal to the string, the method returns a collection of matching elements.
isubindex optional. position of an element to retrieve. this parameter is used when vindex is a string. the method uses the string to construct a collection of all elements that have a name or id property equal to the string, and then retrieves from this collection the element at the position specified by isubindex.

members table

The following table lists the members exposed by the options object. Click a tab on the left to choose the type of member you want to view.
Attributes/Properties
Property Description
length Sets or retrieves the number of objects in a collection.
Methods
Method Description
add Adds an element to the areas, controlrange, or options collection.
item Retrieves an object from the all collection or various other collections.
nameditem Retrieves an object or a collection from the specified collection.
remove Removes an element from the collection.
tags Retrieves a collection of objects that have the specified HTML tag name.
urns Retrieves a collection of all objects to which a specified behavior is attached.

remarks

to delete an option object from a select object, assign the option object a null value. this compresses the array.
if duplicate identifiers are found, a collection of those items is returned. collections of duplicates must be referenced subsequently by ordinal position.

DHTML代码范例

This example shows how to display the text and values of all option objects in the first select object in the document.
var coll = document.all.tags("SELECT");
if (coll.length>0) {
for (i=0; i< coll(0).options.length; i++)
alert("Element " + i + " is " + coll(0).options(i).text +
" and has the value " + coll(0).options(i).value);
}

是否符合公共标准

This collection is defined in World Wide Web Consortium (W3C) Document Object Model (DOM) Level 1 .

Applies To

SELECT